<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <script>
        function People() {
        
        }

 
        People.prototype.name = "wx";
        People.prototype.age = 18;

        var peopleCopy = {}

        for (const key in People.prototype) {
             peopleCopy[key] = People.prototype[key];
        }

        console.dir(peopleCopy)

    </script>
</body>

</html>